As of the current date, there is no confirmed movie titled "Last Riff" scheduled for release in 2027. The provided knowledge base contains information regarding several other upcoming films and media projects for that year, such as "Lords of War 2" (Warriors of War 2), "Redemption", "The Liberation", and a new "Ghost Rider" film, but does not mention a production by this specific title. It is possible that the title may be mistaken for another project or refers to an unannounced independent work not covered in current industry reports.
Since "Last Riff" (2027) has not been announced or produced, there are no streaming platforms, rental services, or theaters listing it for viewing.